I was always the flow-er, I made waves for Noah

Rakim basically created flow. No one really talked about flow before Rakim hit the scene, so he’s the master of flow. Flow is also used to describe the motion of the ocean. Here he’s reffering to another religious figure, Noah, who was responsible for Noah’s ark. Rakim is so good he made waves for Noah.

Also, waves are audio waveforms.

Rakim basically makes waveforms when his tracks are recorded.

He’s always been the man who spit flows, so he even made waves for the Noah’s ark to sail on / waveforms for Noah to listen to.

In a nutshell: he’s (figuratively) always been there doing his thing, even in ancient (Noah’s) times.